John nicholson



leiten tstrs datent @ffice IMPROVEMENT IN PUMPS.

@te Stlgrhnle nimmt tr in tlgrst geiten 33t-linut mit making putt nf tlg: simu.

To ALL WHOM 1r MAY eoNeERN.

Beit known that I, JOHN NICHOLSON, of the city and county of Allegheny, and State of Pennsylvania, have inventada new and useful' Improvement in Pumps;" and I do hereby declare that the following is a full and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon. I

The nature of my invention consists in providingthe upper end of the valve-chamber or working-barrel of a pump with a lock; said lock being furnished with catches and springsj said catches taking hold under the shoulder of a coupling, and held there by means of. said springs until released from theirffhold by means of a' collar on the pump'rod said valve-chamber or working-barrel and its lock being combined with aA yielding seat-place in the pump ease or tubing; the whole being constructed, arranged, and operating in the manner hereinafter described. l

To Aenable others skilled in the art to make and use my invention, I will proceed to deseribejts construction and operation.

In the accompanying drawings, making part of `this specieatiou- Figure 1 represents a longitudinal section of my improvement in `pumps.

Figure 2 represents a side elevation of the lock, which is used for securing the valwe chamber in its place 'in the pump case or tube.

Figure 3 represent-s a transverse section of the lock, cutthrough at dotted line marked 6.

Figure 4 represents a transverse section of the lock, cut through at the dotted line marked 7. (See iig.- 4.)

' The pump-ease or mbe consists-m p'pes an C, the part marked O 'Being Jr-greater dia-meter than' the part marked B, and is secured tothe partmarked B'by means of an ordinary coupling marked A'. In the bottom of the part of the ease' or tube marked C is placed a seat, marked J, the upper end of which is (lished out, so that the valve-chamber h will be guided to a central p osition in the case or tube C. Thediameter of the upper end of the seat J is equal to thc diameter oi' the bore ofthe case or tube C, and the lower part of the seat is furnished with two nuts marked 8 and 9, audits diameter is made equal to the diameter of the opening in the piece markedK on the lower end of the'case or tube C. An opening, Y, passes longitudinally through the seat J, for the purpose of allowing the water, oil, o r other liquids to flow into Vthe valve-chamber or working-barrel k of the pump. When the seat J is placed in the case 'er tube C, and th'e piece marked K is secured to the case or tube, a recess, marked O, is formed. In this recess is placed a spiral spring, marked r, which is used fortwo purposes, to wit, to hold the seat J up against the lower end of the valve-chamber or workingbarrel t of the pump, and for forming a yieldingvbase for said valve-chamber or ,working-barrel, so that the shoulders 2 of the catches g of the lock on the upper end of the valve-chamber will always pass and take hold under the shoulder X of the coupling`v`- A. The lock, which is represented by figs. 2, 3, 4, is furnished with two catches g, which are pivoted at the poi t marked 1, and is also furnished with two springs, marked e,.whieh' are attached to the part marked f of the leek by means of screws marked 3. These springs press on the upper part of the catches marked g, and thereby hold the lower end of the catches out, so that they will catch under the shoulder X of the coupling A. Through thc upper partfof the lock is an opening, through which passes 'the pump-rod D. The lower part, marked f,/ of the lock, is provided with a. large opening, through which passes also the pump-rod. This large opcningjs used for .the purpose of allowing the water, oil, or other liquidsl to flow up, andv through the lock, into thcease As the construction and arrangement of the various parts herein described and represented will readily be understood by the skillful mechanic by reference to the accompanying drawings, I will pyoceed to describe the operation of my improvement, which is as follows: d ,l

The nut 8 on the lower end of the scat J' is screwed up until the seat isdrawn down suiicient to allow room for. the valve-chamber h, and so that the shoulders 2 on the catches g will catch under the shouldei` X of the coupling A. The jam-nut" 9 is then screwed up against the nut 8, to prevent it from turning. 'Ihe valve chamber h andthe pump-rod D are then lowered down into pump-case B and C, and pressed down until the catches g catch under 'the shoulder Xof the Acoupling A. The pump is then ready for pumping. When I ,desire tc remove the valve-ehambar land its valves from case or tube B and C, I draw up the pump-rod D until the will! a' presses on the upper part of. the catches g suieient to release their hold ori the shoulder X of the coupling A. I then draw the rod and yalve-chamher out of the case or tube C and BQ The valve-chamber or working-barre! h and its valves-are constructed in the ordinary manner, and operate in pumping in the usual way. The Beat J, by its yielding, will lcompensate for any sand or dirtvwhih muy gatherin the lower end of the case or tube C, and will, under al1 ordinary circumstances, allow room for the valve-chambervh, so that the catches g will catch under the shoulder X of the coupling A4 A' Having thus deseribed the .'nature, construction, and operutionlof Vmy improvement,what I claim' is of my invention, is- A Providing the upper end of the yalvefchamber or working-barrel h of a pump with a. lock f f', furnished with catches g and springs e; said lock being used in`connection with a coupling A, case C, seat J, nuts K, 8 and 9, spiral spring r, and collar z'on the pump-rodi), the wholev being cohstrueted, a1-ranged, and operating substantially as herein described, nd for the purpose set forth. Y'

e JOHN NICHOLSON. Witnesses: Y

JAMES J. JOHNSTON, JAMES McBmDE. 

